javadoc of Arrays.compare(T[] a, T[] b), line 7122

             * A {@code null} array element is considered lexicographically than a
             * non-{@code null} array element. Two {@code null} array elements are
             * considered equal.

Should be:

            * A {@code null} array element is considered lexicographically less than a
            * non-{@code null} array element. Two {@code null} array elements are
            * considered equal.

Confirmed in test: test/jdk/java/util/Arrays/ArraysEqCmpTest.testNullElementsInObjectArray().